Malicious PDF — malware analysis report

Static analysis result for SHA-256 5930c1e12f5af650…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 19:38:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4765e475657d01a2747b9237bb476a9c SHA-1: 8a6734eae471cbb3cada548223c2cd58a3a08e71 SHA-256: 5930c1e12f5af6508f34d9c38f165b0b102dc751e90a2377b2f83f1cb85c7036
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-free-spins-twitter-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacks-for-prisone-life-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-mask-hat_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-cards-for-100_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-administrator-badge-hack-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-use-noclip-hacks-roblox-2021-november_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/install-hacked-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-an-acount-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/soul-dynasty-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-stuff-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacker-de-robux-para-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-pc-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000330d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330D 22968 bytes
SHA-256: 0bbee40ae06650a8f5f64cf5fc261d0bb792a0f5488074f6c9531d585c8368ab
font_01_sfnt_off000066ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AC 18336 bytes
SHA-256: abbe9628f892dbb62650ce0db0182e7fd8745ccab8f80121ec4badf33f99fb7a

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